Montgomery County · Pop. 137,644
Dayton sits at the heart of the Miami Valley — the broad glacial outwash plain carved by the Great Miami River through southwestern Ohio. Home to Wright-Patterson Air Force Base (the Air Force's largest installation), a major VA Medical Center, and significant technology and aerospace industries, Dayton is an economically diverse mid-sized city in the early stages of a post-deindustrialization recovery. The suburban and rural fringe of Montgomery County — the Centerville/Washington Township corridor, the Germantown and Miamisburg areas, and the eastern townships — has substantial septic infrastructure serving residential development that predates sewer expansion and ongoing exurban growth. The Great Miami River aquifer beneath the Dayton area is one of Ohio's most critical drinking water resources, providing water to much of the Miami Valley region. This groundwater source is under active protection through Ohio EPA's Wellhead Protection Program, and HSTS permits near the aquifer recharge zones receive careful scrutiny. Montgomery County's glacial till soils — particularly the slow-draining Crosby silt loam that covers much of the county's uplands — create challenging conditions for conventional septic installation that drive the local engineered systems market.
Restore or replace failed leach fields and drain lines to prevent sewage surfacing and groundwater contamination.
$2,000 – $15,000
Commercial grease trap cleaning and pumping to prevent sewer blockages and maintain health code compliance.
$200 – $800
Comprehensive evaluation of your septic system's condition, required for real estate transactions in most states.
$300 – $600
Complete new septic system design and installation, from perc testing to final inspection.
$3,500 – $20,000
Regular pumping removes accumulated solids from your septic tank, preventing backups and extending system life.
$275 – $600
Diagnose and fix septic system problems including leaks, clogs, baffle failures, and component replacements.
$500 – $5,000
Professional water well drilling for residential and commercial properties without access to municipal water.
$6,000 – $25,000
Diagnose and repair well pump failures, pressure tank issues, and water flow problems.
$300 – $3,000
Toledo, OH 00000
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Dayton, OH 00000
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Cincinnati, OH 00000
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Cincinnati, OH 00000
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Dayton, OH 00000
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Columbus, OH 00000
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Columbus, OH 00000
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Columbus, OH 00000
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Dayton, OH 00000
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Dayton, OH 00000
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Toledo, OH 00000
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| Service | Average Cost |
|---|---|
| Septic Tank Pumping | $255 - $440 |
| Septic System Installation | $6,000 - $18,000 |
Dayton and Montgomery County soils are dominated by Crosby silt loam, Miamian silt loam, and Brookston silty clay loam — Alfisols (Aqualfs and Udalfs) formed in Illinoian and Wisconsinan-age glacial till of the Miami Valley. The Crosby series is a somewhat poorly drained Aeric Epiaqualfs with a silty clay loam subsoil developed in low-lime, clay-enriched till — slow permeability (0.06–0.2 inches per hour) and a seasonal high water table at 12–24 inches. Miamian silt loam on well-drained uplands is more permeable with water tables at 3–6 feet. Brookston silty clay loam occupies poorly drained depressions with water tables at 0–18 inches seasonally. The Great Miami River alluvium (Fox silt loam, Ockley silt loam) is deep and well-drained but requires floodplain setbacks.
Montgomery County's dominant soil — Crosby silt loam — is a glacial till-derived Alfisol that characterizes much of the western Ohio glaciated landscape. The Crosby Bt horizon has 38–50% clay content, slow permeability (0.06–0.2 inches per hour), and develops a seasonal high water table at 12–24 inches during winter-spring wet periods. These characteristics present significant challenges for conventional gravity septic systems: the slow clay absorption requires large drainfield footprints, and the shallow seasonal water table constrains available soil depth above the saturation zone. Ohio's minimum 12-inch separation from drainfield trench bottom to seasonal high water table can be difficult to achieve on Crosby soil positions in spring. Well-drained Miamian silt loam on ridge positions is significantly more favorable: moderate permeability (0.5–1.5 inches per hour in the Bt), water tables at 3–6 feet, and adequate depth above restriction. Site evaluation identifying whether a given lot occupies Crosby or Miamian soil position is the most critical determinant of system type.
Montgomery County Combined Health District enforces Ohio OAC 3701-29 (HSTS rules). Ohio requires all new system designs to be prepared by a licensed PE or registered sanitarian with septic design credentials — no owner-designed systems. Site evaluations use soil morphology (no mandatory perc test since 2015 revision). The Great Miami River Wellhead Protection Zone covers portions of the Miami Valley where HSTS permits face additional Ohio EPA review to protect the shallow sand-and-gravel aquifer beneath the floodplain. Ohio's 3701-29 rules create a tiered system of HSTS types from conventional to advanced treatment, with system type determined by site evaluation results. Montgomery County requires maintenance contracts for advanced treatment systems.
Montgomery County Combined Health District issues HSTS permits under ORC 3718 and OAC 3701-29. Licensed PE or registered sanitarian with septic design credentials required for all system designs. Permit fee: $250–$400. Dayton city sewer (operated by the City of Dayton and Montgomery County Sanitary Engineer) serves most of the urban core; suburban and rural Montgomery County — Miamisburg, Centerville, Beavercreek (Greene County), Germantown, and the county's rural townships — uses significant septic. Wright-Patterson AFB manages its own wastewater. The Great Miami River aquifer (one of Ohio's most important drinking water sources) underlies the county and creates groundwater protection review for HSTS permits.
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